How to Really Diagnose and Understand Network Issues in Linux using Ping, Traceroute and TCPDump

You might think you know the ping and traceroute command but how well do you really know them. In this short video you will learn to understand the packets and the return values but decoding them with TCPDump. You will see traceroute and the TTL in action in the captured packets and that UDP is used by default Linux and not ICMP for traceroute

[@horatiumarasescu6187]

And here I thought that I knew ping. So much ignorance on my part. Thanks Andrew, this is what I really needed. Sometimes, everyone needs someone who just shows one what one's lacking.

[@ozzyoddity]

The Feynman Technique, ftw!

[@theurbanpenguin]

Thank you again for your continued support and insightful comments. Which country are you from.

[@ozzyoddity]

@@theurbanpenguin USA. But not the typical American you see on tv.

[@ozzyoddity]

@@theurbanpenguin I'v just began to look at other video tutorials that you have posted in the past. Are they others not posted on YT?

[@rotrose7531]

Thank you always for these precious lectures. We are all addicted to it.

[@theurbanpenguin]

As always I really appreciate your feedback

[@TheIaluma]

All can say is LFC all the way, and thank you for being a great teacher all these years.

[@theurbanpenguin]

They are going to ace the league this year

[@HabiburRahman-xs9gb]

You are a wizard Harry

[@AwesomeBob]

Digging the new formats :)

[@theurbanpenguin]

Thank you so much

[@ARemi-zp6wb]

I love this man full of knowledges

[@theurbanpenguin]

Thanks for the kind comment

[@whateveritwasitis]

@10:20 you say its not until the final request (seq 35?)that you get an Echo reply coming back, but i dont see the difference; outside of the seq. its identical to the one before it ?

[@encapsulatio]

Can you do please a video on how to troubleshoot DSL pppoe connections? I found that vast majority of linux distros have nonfunctional setup wizards for my ISP that only provides the username and password and the rest the wizard needs to figure out. On Linux Mint and Windows 10 the Network Manager establishes the correct setup, but for the vast majority of other distros it simply does not work for my ISP.

[@janglestick]

fun stuff

[@theurbanpenguin]

Thank you

[@fuseteam]

i have this weird dejavu feeling

[@candyczar]

Ever used mtr? :)